Determination of Copper in Different Ethanolic Matrices Using a Chloropropyl Silica Gel Modified with a Nanostructured Cubic Octa(3-aminopropyl)octasilsesquioxane

Table 4

Recovery of Cu²⁺ after percolation of 30.0 mL of solution in the column filled with SGAPC.

[Cu^2+]initial	[Ni^2+]initial	[HCl]	[Cu^2+]eluted	Recovery
(mg L^−1)	(mg L^−1)	(mol L^−1)	(mg L^−1)	(Cu^2+) (%)
3.728	0	0.01	0.100 ± 0.003	2.7 ± 0.3
3.728	0	0.10	1.195 ± 0.011	32.1 ± 1.1
3.728	0	0.50	3.567 ± 0.012	95.7 ± 1.2
3.728	0	1.00	3.753 ± 0.009	100.6 ± 0.9
0.500	0.500	0.01	0.006 ± 0.004	1.2 ± 0.4
0.500	0.500	0.10	0.007 ± 0.003	1.4 ± 0.3
0.500	0.500	0.50	0.302 ± 0.010	60.0 ± 1.0
0.500	0.500	1.00	0.355 ± 0.014	71.0 ± 1.4